EP0360947A1 - Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges - Google Patents

Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges Download PDF

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Publication number
EP0360947A1
EP0360947A1 EP88810674A EP88810674A EP0360947A1 EP 0360947 A1 EP0360947 A1 EP 0360947A1 EP 88810674 A EP88810674 A EP 88810674A EP 88810674 A EP88810674 A EP 88810674A EP 0360947 A1 EP0360947 A1 EP 0360947A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
bore
pliers according
tool
elastically deformable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88810674A
Other languages
English (en)
French (fr)
Other versions
EP0360947B1 (de
Inventor
Charles Gérard Willen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pcm Willen Sa Outillages De Precision
Original Assignee
Pcm Willen Sa Outillages De Precision
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pcm Willen Sa Outillages De Precision filed Critical Pcm Willen Sa Outillages De Precision
Priority to DE3852309T priority Critical patent/DE3852309T2/de
Priority to AT88810674T priority patent/ATE114522T1/de
Priority to EP88810674A priority patent/EP0360947B1/de
Priority to JP63271125A priority patent/JPH0741470B2/ja
Priority to AU41587/89A priority patent/AU618131B2/en
Priority to DK480989A priority patent/DK480989A/da
Priority to KR1019890014134A priority patent/KR940004789B1/ko
Publication of EP0360947A1 publication Critical patent/EP0360947A1/de
Application granted granted Critical
Publication of EP0360947B1 publication Critical patent/EP0360947B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/08—Chucks holding tools yieldably
    • B23B31/083—Chucks holding tools yieldably axially

Definitions

  • the present invention relates to a clamp intended for carrying a machining tool, in particular a machining tool, subjected on the one hand, to a rotational movement around its axis and, on the other hand, to an axial displacement.
  • a machining tool subjected on the one hand, to a rotational movement, and on the other hand, to an axial displacement, movements which are imparted to it by the appropriate machine, is in certain cases subjected to its own axial movement resulting from the rotation of the tool and the friction on the surface to be machined, which is in particular the case of a tap but the same phenomenon can occur for other machining operations.
  • tapping devices and also quick-change tool holders with interchangeable bits of several types. These tips can provide several functions but never an axial compensation incorporated in the volume of the basic interchangeable tip. On the other hand, the tip is added to its support which increases the length of the total size.
  • the object of the present invention is to propose a tool holder pliers allowing automatic compensation of the differences in the axial movements of a machining tool, avoiding the need to use special and bulky devices for machining and in particular the tapping with automatic machines with numerical control.
  • the clamp according to the present invention is defined by the characterizing clause of claim 1.
  • the tool holder pliers With an external body whose shape corresponds to a usual pliers intended to be supported by a known pliers holder, by placing in a bore of this body a socket which will hold the machining tool and being able to effect an axial displacement inside the bore of the external body between predetermined limits and against the deformable elastic means recalling the bushing at a predetermined rest position, automatic axial compensation is obtained with an amplitude which is of course limited by the construction and the dimensions of the clamp.
  • This compensation with respect to the rest position of the socket can be made in one direction or another or in both as will be explained in the description.
  • the advantages of this built-in axial compensation clamp are:
  • the pliers of the invention make it possible to provide, in addition to the clamping function, the function of the uni or bidirectional axial compensation in the same volume as that of the standard pliers which only clamp the tool.
  • the machining operation in particular a tapping
  • standard collet holders of different lengths and sizes making it possible to adapt to the varied configurations of the workpieces much better than with conventional devices
  • the tool holders driven tapping to allow axial compensation are of construction as mentioned above relatively complicated; they are expensive and bulky and can only be used for tapping.
  • the tapping pliers according to the invention makes it possible to carry out this last operation with the drilling or milling tool holders, thus making it unnecessary to install a specific complete device for tapping; the tool holder pliers according to the invention also simplifies equipping a workshop with a tool holder and provides the user with great flexibility of use. tion because, the machines having various attachments for the tool holders, these can only pass from one machine to another in a relatively limited way, which is not the case for pliers according to the 'invention which is not related to the attachment of the tool holder and can therefore equip any machine.
  • This gripper system thus offers the possibility of almost completely rationalizing the equipment of a workshop concerning various machining jobs carried out in particular on CNC lathes, machining centers and CNC milling machines. So the economic advantage is considerable.
  • the design of the pliers makes it a simple and robust accessory which resists practically without damage to false operations or accidents which may occur, only the means ensuring the holding of the tool, which are preferably screws arranged radially in the socket, sometimes need to be replaced and of course the tool itself.
  • the means ensuring the kinematic connection in rotation between the two basic elements of the clamp are of conjugate polygonal surfaces provided on the external part of the sleeve and part of the bore.
  • these means can be conjugate toothed surfaces provided on the external surface of the sleeve and the bore.
  • the kinematic connection means in rotation comprise at least one key.
  • two conjugate plates provided on the outer surface of the sleeve and the bore provide the kinematic connection between the outer body and the socket.
  • balls rolling in axial, inclined or helical grooves made, on the one hand, on the external surface of the sleeve and, on the other hand, in the thread, provide the kinematic connection between these two parts.
  • the axial displacement of the sleeve inside the bore is limited, on the one hand, by an attached part fixed to the end of the sleeve and, on the other hand, by respective shoulders and conjugates provided in the bore and socket.
  • the elastically deformable means can be either springs or elastic washers or a body of elastically deformable material.
  • the clamp of FIG. 1 is provided for compensation of the axial displacement only in one direction, that is indicated by the arrow F.
  • an outer body 1 provided with a bore 2 inside which is a bushing 3 and, a spring 4 disposed between the bushing 3 and the bore 2 against a shoulder 5 of the bore 2 and a shoulder 6 of the sleeve.
  • the construction in general of the clamp and more precisely of the external body 1 is not linked to a particular type or form of clamp and it is similar or at least compatible with the clamps existing on the market. It allows the attachment of the machining tool, the tail of which corresponds to the bore 7 of the sleeve 3 and it is tightened by screws 8 arranged radially on the rear part of the sleeve 3 and acting on the driving square or on one or more machined plates on the tail of the tool.
  • the kinematic connection in rotation between the external body 1 and the sleeve 3 is obtained by means of a first prismatic surface 9 of the sleeve with a corresponding prismatic surface 10 of the external body 1. These same surfaces are used for axial guidance, during movement compensation, of the sleeve 3 inside the body 1.
  • the maximum autonomous displacement of the sleeve 3 inside the body 1 is determined, on the one hand, by a shoulder 11 of the sleeve which abuts against the shoulder 5 of the bore, and, on the other hand, by a ring 12 fixed in a groove of the sleeve 3 and which in the rest position abuts against the internal face of the body 1 and in particular abuts at bottom of housing 13.
  • the operation of the clamp of FIG. 1 with a tap is as follows: the linear advance of the machine is adjusted so that it is slightly lower, on the own advance of the tap, which is defined, on the one hand , by the speed of rotation and, on the other hand, the pitch of the tap propeller.
  • the tap performs a proper compensation movement, that is to say that the sleeve 3 moves in the direction F as and when the tapping operation.
  • a desynchronization can take place between the axial advance imposed by the machine and the proper advance of the tap and this is compensated by the possibility of the sleeve to move in one direction or in another.
  • the machine advance is preferably set to 95% of the tap's own advance, so at the time of the synchronized reversal of the spindle rotation and the advance movement we are approximately in the middle of the compensation stroke .
  • the return movement of the machine is adjusted to the value of the return movement specific to the tap so that the collet remains in its compensation stroke avoiding any stress on the tap. The longer the gripper compensation stroke the easier the operation adjustment.
  • a delay may be necessary when reversing the rotation and the linear feed.
  • a tool holder pliers comprising an outer body 15 provided with a bore 16 inside which moves a bush 17 and two opposing springs 18 and 19 allowing the axial displacement of the bush 17 from from the rest position in both directions F1 or F2.
  • the spring 18 is housed inside the bore and it is supported on one side on a shoulder 20 of the body 15 and on the other side on a shoulder 22 of the sleeve 17.
  • the spring 19 is supported on the other face of the shoulder 20 of the body 15 and against a ring 23 screwed onto the end of the sleeve 17.
  • the maximum axial movement in the direction F1 is limited by the shoulder 24 of the sleeve 17 against which the 'shoulder 20 abuts.
  • the movement is limited by the shoulder 25 of the nut 23 against which the front part of the outer body abuts 15.
  • the kinematic connection in rotation between the outer body 15 and the bush 17 can also be achieved by conjugated prismatic surfaces produced respectively at the rear part of the external body 15 and of the sleeve or at the level of the median surface 28. Screws 26 arranged radially hold the tail of the tool inside the bore 27 of the socket 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
EP88810674A 1988-09-30 1988-09-30 Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges Expired - Lifetime EP0360947B1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE3852309T DE3852309T2 (de) 1988-09-30 1988-09-30 Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges.
AT88810674T ATE114522T1 (de) 1988-09-30 1988-09-30 Spannzange zum halten eines werkzeuges, insbesondere einer schneidwerkzeuges.
EP88810674A EP0360947B1 (de) 1988-09-30 1988-09-30 Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges
JP63271125A JPH0741470B2 (ja) 1988-09-30 1988-10-28 切削工具把持用コレット
AU41587/89A AU618131B2 (en) 1988-09-30 1989-09-20 Collet intended to carry a tool, particularly a tapping tool
DK480989A DK480989A (da) 1988-09-30 1989-09-29 Patron beregnet til at baere et vaerktoej, isaer et gevindskaerende vaerktoej
KR1019890014134A KR940004789B1 (ko) 1988-09-30 1989-09-30 공구, 특히 탭핑공구를 반송하기 위한 코레트

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88810674A EP0360947B1 (de) 1988-09-30 1988-09-30 Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges

Publications (2)

Publication Number Publication Date
EP0360947A1 true EP0360947A1 (de) 1990-04-04
EP0360947B1 EP0360947B1 (de) 1994-11-30

Family

ID=8200605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810674A Expired - Lifetime EP0360947B1 (de) 1988-09-30 1988-09-30 Spannzange zum Halten eines Werkzeuges, insbesondere einer Schneidwerkzeuges

Country Status (7)

Country Link
EP (1) EP0360947B1 (de)
JP (1) JPH0741470B2 (de)
KR (1) KR940004789B1 (de)
AT (1) ATE114522T1 (de)
AU (1) AU618131B2 (de)
DE (1) DE3852309T2 (de)
DK (1) DK480989A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887135A1 (de) * 1997-06-19 1998-12-30 Emuge-Werk Richard Glimpel Fabrik für Präzisionswerkzeuge (vormals Moschkau & Glimpel) Gewindeschneidfutter für rigid tapping
EP1693134A2 (de) * 2005-02-18 2006-08-23 Zettl GMBH Gewindebohreraufnahme
US20110006489A1 (en) * 2009-07-07 2011-01-13 Jin-Tsai Lai Quick-release mechanism for hand tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10224127C1 (de) * 2002-05-29 2003-12-24 Ernst Graf Gmbh Halter für ein Drehwerkzeug, insbesondere für einen Abstechstahl
KR100753887B1 (ko) * 2006-06-15 2007-09-05 남궁규성 플로팅 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1702810A (en) * 1923-12-29 1929-02-19 Joseph F Buhr Tapping chuck
GB1066486A (en) * 1963-08-16 1967-04-26 Derek Edwin Fitton A tool holder for a screw cutting tap or die
DE1552495A1 (de) * 1966-04-27 1969-12-04 Rolf Winter Bohreinrichtung,insbesondere zum Tieflochbohren fuer Bohr- und Drehmaschinen
DE2001007A1 (de) * 1970-01-10 1971-07-22 Emuge Werk Richard Glimpel Gewindeschneid-Schnellwechselfutter mit axialem Laengenausgleich
US4021133A (en) * 1975-04-16 1977-05-03 Ex-Cell-O Corporation Tap driver apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4719890U (de) * 1971-02-08 1972-11-06
JPS5683333U (de) * 1979-11-22 1981-07-04

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1702810A (en) * 1923-12-29 1929-02-19 Joseph F Buhr Tapping chuck
GB1066486A (en) * 1963-08-16 1967-04-26 Derek Edwin Fitton A tool holder for a screw cutting tap or die
DE1552495A1 (de) * 1966-04-27 1969-12-04 Rolf Winter Bohreinrichtung,insbesondere zum Tieflochbohren fuer Bohr- und Drehmaschinen
DE2001007A1 (de) * 1970-01-10 1971-07-22 Emuge Werk Richard Glimpel Gewindeschneid-Schnellwechselfutter mit axialem Laengenausgleich
US4021133A (en) * 1975-04-16 1977-05-03 Ex-Cell-O Corporation Tap driver apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887135A1 (de) * 1997-06-19 1998-12-30 Emuge-Werk Richard Glimpel Fabrik für Präzisionswerkzeuge (vormals Moschkau & Glimpel) Gewindeschneidfutter für rigid tapping
EP1693134A2 (de) * 2005-02-18 2006-08-23 Zettl GMBH Gewindebohreraufnahme
EP1693134A3 (de) * 2005-02-18 2008-10-01 Zettl GMBH Gewindebohreraufnahme
US7500811B2 (en) 2005-02-18 2009-03-10 Zettl Gmbh Thread cutting tap retainer
US20110006489A1 (en) * 2009-07-07 2011-01-13 Jin-Tsai Lai Quick-release mechanism for hand tool
US8262097B2 (en) * 2009-07-07 2012-09-11 Jin-Tsai Lai Quick-release mechanism for hand tool

Also Published As

Publication number Publication date
ATE114522T1 (de) 1994-12-15
AU4158789A (en) 1990-04-05
JPH0741470B2 (ja) 1995-05-10
DK480989A (da) 1990-03-31
KR940004789B1 (ko) 1994-06-01
DK480989D0 (da) 1989-09-29
EP0360947B1 (de) 1994-11-30
DE3852309D1 (de) 1995-01-12
DE3852309T2 (de) 1995-06-08
AU618131B2 (en) 1991-12-12
KR900004448A (ko) 1990-04-12
JPH0295503A (ja) 1990-04-06

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